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Status display Status
The status display provides information in special system situations and problems. It is
mostly intended for use with solar thermal systems, but can also be useful with other dia-
grams. The status display can then only operate if an active function check is set off via de-
fective sensors S1 – S3. For solar applications, a distinction has to be made between three
status areas:
Function check and collector excess temperature are not active = no system re-
sponse is analysed. Only a bar appears in the display in Status.
Collector excess temperature is active = the excess temperature that occurs during
system standstill only leads to the display CETOFF (the collector’s excess-temperature
cut-off is active) during this time under Status. The display Status does not flash.
Function check is active = monitoring of interruption (IR) and short circuit (SC) of the
solar sensors and circulation problems. If this outlet is active and the differential tempera-
ture between collector S1 and tank S2 is greater than 60K for more than 30 minutes, the
error message CIRERR (circulation error) is output. This status ( Status blinks) is
maintained even after the error has been remedied and has to be cleared in the status
menu using the command CLEAR.
In Status, OK is displayed when the monitoring function is activated and the system’s
operation is correct. If there is anything unusual, Status blinks regardless of the display
position.
If the control output is set to "STAT N" or "STAT I" and the function control is activated,
then if any of the errors "sensor open circuit, sensor short-circuit or circulation error" occur,
the control output is switched over. Subsequently the auxiliary relay HIREL-STAG can be
used to forward this error message to a signalling device. Upon collector excess temperature
switch-off CETOFF, the control output does not switchover.
Function check disabled
Collector - excess
temperature - cut-
off is active
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